body {
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    font-size: 16pt;
}

.button {
  background-color: #e3891b; /* Green */
  border: 0;
  color: white;
  padding: 14px 14px;
  text-align: center;
  font-size: 16pt;
  margin: 2px 2px;
  width: 100px;
}

.app {
    display: flex;
    justify-content: center;
    flex-direction: row;
}

.button-panel {
    display: flex;
    justify-content: center;
}

.parent {
  display: flex;
  flex-direction: column;
  row-gap: 10px;
}

.child {
    display: flex;
    justify-content: center;
    column-gap: 10px;
}